Finding the Fourth Proportional to 42,680,312.64, 64,032,456.15 and 17,139,258.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42,680,312.64 : 64,032,456.15 = 17,139,258.18 : x
2. Step 2: Convert to fraction form
   42,680,312.64/64,032,456.15 = 17,139,258.18/x
3. Step 3: Cross multiply
   42,680,312.64x = 64,032,456.15 × 17,139,258.18
4. Step 4: Simplify right side
   42,680,312.64x = 1,097,468,797,854,378.75
5. Step 5: Solve for x
   x = 1,097,468,797,854,378.75/42,680,312.64
6. Step 6: Final answer
   x = 25,713,701.00